I'll do what I can to define those terms:
OT- Occupational Therapy
ABA- Applied Behavioral Analysis, applied to children with autism by O.Ivar Lovaas in the sixties. Sometimes called the Lovaas method.
Weighted blanket- A quilted blanket with weights sewn into it (mine are filled with polybeads 8#s of them). Some children seek deep pressure and these blankets can help with that.
SID- Sensory Intergration Disorder